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package com.googlecode.mindlistening.util;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;

/**
 *
 * @author ryan
 */
public class ClasspathHacker {
    private static final Class[] parameters = new Class[]{URL.class};

    public static void addFile(String s) throws IOException {
            File f = new File(s);
            addFile(f);
    }//end method

    public static void addFile(File f) throws IOException {
            addURL(f.toURI().toURL());
    }//end method


    public static void addURL(URL u) throws IOException {

            URLClassLoader sysloader = (URLClassLoader)ClassLoader.getSystemClassLoader();
            Class sysclass = URLClassLoader.class;

            try {
                    Method method = sysclass.getDeclaredMethod("addURL",parameters);
                    method.setAccessible(true);
                    method.invoke(sysloader,new Object[]{ u });
            } catch (Throwable t) {
                    t.printStackTrace();
                    throw new IOException("Error, could not add URL to system classloader");
            }

    }
}
